DMAX of Moraine, Ohio, USA is a manufacturer of Diesel engines for trucks. Originally a joint venture between General Motors and Isuzu, now all owned and operated by General Motors, the formation of DMAX was announced in December 1998. The company's Duramax V8 engine has been extremely successful for GM. Prior to the founding of the DMAX venture, the Moraine plant produced GM's 6.2 L Diesel V8. Production of that engine began in 1982.